/*
 * @Author: Jiraiya
 * @Date: 2020-02-29 23:54:06
 * @LastEditors: Jiraiya
 * @LastEditTime: 2020-02-29 23:54:43
 * @Description: 
 */
var x = 1
const obj = {
    x: 2,
    f: ()=>{console.log(this === global)}
}
obj.f()
console.log(global.x)